AR90s with rubber surrounds

[blanddawg625]

I recently bought a pair of AR90s and found that all the woofers- 2 8" and all 4 10" have been resurrounded with rubber instead of foam. I have read that it is not so bad for the 8", but what about the 4 10" woofers? How will this effect the sound and is there a remedy for this. I have already noticed a lack of efficiency with them but what else will be different. Thoughts?

[Aadams]

A few AR9s were delivered with rubber surrounds on the 8inch.  There has never been a mention of original rubber surrounds on any AR woofers up through the Vertical Series.    Assuming they are installed correctly, the woofers will be less compliant at the lowest frequencies but the AR90 bass is so prodigiously strong you may not be able to hear a difference unless you had a correct 9 or 90 in the room to compare.  Regarding efficiency, are you sure you don't have leaks, are you sure the white wadding inside the cabinet above the woofers has not been disturbed or removed, and are you following placement guidelines for the AR9 and 90.

Adams

Forgot to mention, Are you sure the woofers are wired in phase externally and internally?

[lance G]

1 hour ago, blanddawg625 said:

I recently bought a pair of AR90s and found that all the woofers- 2 8" and all 4 10" have been resurrounded with rubber instead of foam. I have read that it is not so bad for the 8", but what about the 4 10" woofers? How will this effect the sound and is there a remedy for this. I have already noticed a lack of efficiency with them but what else will be different. Thoughts?

Maybe some new capacitors in the crossovers might be needed ?